You may have an old OBP version, try upgrading to the latest.
Or the kernel config got b0rked around (there were Kconfig updates for sparc lately so it's possible)._________________Gustavo Zacarias
Gentoo/SPARC monkey

What do you mean with b0rked around...?
I copy over the old .config and always make oldconfig first, this has never failed me on any of my systems before, including the ol' trusty SPARC _________________Staying crunchy even in milk!

Yeah only you
Try my config at http://dev.gentoo.org/~gustavoz/sparc/configs (u5 one, it's basically the same machine as an u10, just enable creator if you have thru menuconfig)._________________Gustavo Zacarias
Gentoo/SPARC monkey